package com.item.mofan.controller;

import com.item.mofan.common.Result;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.UUID;

//公共Controller
@RestController
@RequestMapping("/common")
public class CommonController {
    @Value("${mofan.path}")
    private String basePath;

    FileInputStream inputStream=null;
    ServletOutputStream outputStream=null;

    /**
     * 文件上传
     *
     * @param file
     * @return
     */
    @PostMapping("/upload")
    public Result<String> upload(MultipartFile file) {

        String originalFilename = file.getOriginalFilename();
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));
        String filename = UUID.randomUUID().toString() + suffix;

        File dir = new File(basePath);
        if (!dir.exists()) {
            dir.mkdirs();
        }

        try {
            file.transferTo(new File(basePath + filename));
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return Result.success(filename);
    }

    @GetMapping("/download")
    public void download(String name, HttpServletResponse response) throws IOException {

        try {
             inputStream = new FileInputStream(new File(basePath + name));

             outputStream = response.getOutputStream();

            response.setContentType("image/jpeg");
            int len = 0;
            byte[] bytes = new byte[64];
            while ((len = inputStream.read(bytes)) != -1) {
                outputStream.write(bytes, 0, len);
                outputStream.flush();
            }


        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
            inputStream.close();
            outputStream.close();
        }
    }
}
